Question

2) Two angles of a triangle are of measures 30° and 70° respectively. Find the third angle. 30°
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Answer 1

Step-by-step explanation:

Sum of measure of all angles of a triangle is 180°

:. 30° + 70° + 3rd angle = 180°

:. 100° + 3rd anles = 180°

:. 3rd angle = 180 - 100

$\huge \colorbox{lavender}{3rd \: angle \: = \: 80°}$

Answer 2

Heya mate... let's do it cmon...

overview: we have to find 3rd angle

but how can we? : we know that all sums of a triangle add upto 180

                               so we will first add 2angles and then subtract from 180...

step 1) add two angles

= 70 + 30

= 100

step 2) subtract the answer from 180

= 180 - 100

= 80

step 3) hurray! we have got the answer

its 80°

=> 80°  IS THE 3RD ANGLE

have a great day ahead friend...